#1B24A0#1B24A0

#1B24A0 is a dark, vivid blue. Relative luminance 0.040; OKLCH L 36.1% C 0.193 H 268.9°. Best body text is #FFFFFF at 11.62:1 contrast (WCAG AA passes).

Color values

HEX	#1B24A0
RGB	rgb(27, 36, 160)
HSL	hsl(236, 71%, 37%)
HSV	hsv(236, 83%, 63%)
CMYK	cmyk(83.1%, 77.5%, 0%, 37.3%)
CIE-LAB	lab(23.78, 42.30, -66.62)
CIE-LCH	lch(23.78, 78.92, 302.41°)
OKLab	oklab(36.08% -0.0035 -0.193)
OKLCH	oklch(36.08% 0.193 268.9)
XYZ	xyz(7.4259, 4.0319, 33.6378)
Luminance	0.0403 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B24A0 #A0971B

analogous

#1B67A0 #1B24A0 #551BA0

triadic

#1B24A0 #A01B24 #24A01B

tetradic

#1B24A0 #A01B67 #A0971B #1BA055

square

#1B24A0 #A01B67 #A0971B #1BA055

split-complementary

#1B24A0 #A0551B #67A01B

monochromatic

#090C37 #12186C #1B24A0 #2430D4 #535DE2

Accessibility & contrast

On white

11.62

#1B24A0 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.81

#1B24A0 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B24A0

11.62:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B24A0	#FFFFFF	#000000	##FFFFFF
##1B24A0	1.00	11.62	1.81	11.62
#FFFFFF	11.62	1.00	21.00	1.00
#000000	1.81	21.00	1.00	21.00
##FFFFFF	11.62	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003FA4

Deuteranopia (green-blind)

#00329E

Tritanopia (blue-blind)

#004961

Achromatopsia (no color)

#393939

Design tokens & code

CSS

--color: #1b24a0;
/* rgb */ color: rgb(27, 36, 160);
/* oklch */ color: oklch(36.1% 0.193 268.9);

Tailwind

colors: {
  custom: {
    50: '#7260bd',
    500: '#1b24a0',
    950: '#000000',
  },
}

SCSS

$custom: #1b24a0;
$custom-light: #7260bd;
$custom-dark: #000000;

JSON

{
  "hex": "#1b24a0",
  "rgb": {
    "r": 27,
    "g": 36,
    "b": 160
  },
  "hsl": {
    "h": 235.94,
    "s": 71.123,
    "l": 36.667
  },
  "oklch": {
    "l": 0.36075,
    "c": 0.19306,
    "h": 268.9
  },
  "luminance": 0.04033
}

Semantic roles & 50–950 ramp

primary

#1B24A0

secondary

#C5BD52

accent

#E23AEE

background

#F7F5FB

surface

#EEEAF7

border

#C9C6D0

text

#0A0512

muted

#7C7981

Preview Lab

Preview with #1B24A0

Body copy rendered with the generated semantic roles for this colour.

Preview Lab → · Contrast checker → · Palette generator →